BSOD after 1-5 minutes ingame

last time i installed sp1, my wireless connection wouldn't work. is that problem solved?

i do not use antiviruses because... i am a lazy person, i guess (also a bit stupid, but i can live with that), just made a full scan with malwarebytes. anyway
PROBLEM SOLVED!!!
thank you very much for your moral support!
the final solution in my case was to underclock my GPU (i used MSI Afterburner).
there is no more problem now.
if it keeps so for 2-3 days, i shall mark this post as solved.
//i will keep the changes, for one can never be too sure:))

problem fully solved by underclock (to 537 for my gt540m). nice holydays!